/*
 * The MIT License
 *
 * Copyright (c) 2011 Takahiro Hashimoto
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package jp.a840.websocket.handshake;

import java.nio.ByteBuffer;

import jp.a840.websocket.HttpHeader;
import jp.a840.websocket.util.StringUtil;

/**
 * The Class HttpResponseHeaderParser.
 *
 * @author Takahiro Hashimoto
 */
public class HttpResponseHeaderParser {

    /**
     * The response header.
     */
    private HttpHeader responseHeader = new HttpHeader();

    /**
     * The complete.
     */
    private boolean complete = false;

    /**
     * Parses the.
     *
     * @param buffer the buffer
     */
    public void parse(ByteBuffer buffer) {
        if (complete) {
            throw new IllegalStateException("Parser already parse completed");
        }
        do {
            String line = StringUtil.readLine(buffer);
            if (line == null) {
                return;
            }
            if (line.indexOf(':') > 0) {
                String[] keyValue = line.split(":", 2);
                if (keyValue.length > 1) {
                    responseHeader.addHeader(keyValue[0].trim(),
                            keyValue[1].trim());
                }
            }
            if ("\r\n".compareTo(line) == 0) {
                complete = true;
                return;
            }
            if (!buffer.hasRemaining()) {
                return;
            }
        } while (true);
    }

    /**
     * Checks if is completed.
     *
     * @return true, if is completed
     */
    public boolean isCompleted() {
        return complete;
    }

    /**
     * Gets the response header.
     *
     * @return the response header
     */
    public HttpHeader getResponseHeader() {
        return responseHeader;
    }
}
